- Li-Ion (xiaomi bm20 3.7v and 804066 3.7V) stored between 3.6 to 3.8v, my home temperature varies between 33-35C. How often should I charge these batteries (weekly, monthly, yearly) to keep them in good condition for long-term storage? If their charge drops too much, they swell or die.
- AA Ni-MH batteries, storing them empty with zero charge reduces their useful life? If I charged these Ni-MH AA batteries to 100% and stored them at my home temperature varies between 33-35C. How often should I charge them (weekly, monthly, yearly) to keep these batteries in good condition for long-term storage?
Charge before storing your battery, charge it to 40–50% of its capacity. You can also charge it once every six months to 50% of its capacity. A lot depends on how much you use it and how far you deplete it.
Nickel-metal hydride (NiMH) batteries can be recharged up to 500 times, which could mean they can last for 10 years. However, NiMH batteries slowly discharge themselves even when they're not in use. You can estimate that 20% of the battery's power will be depleted within the first 24 hours after charging, and 10% will be depleted every 30 days thereafter. If the remaining battery time is too short, the battery may be permanently damaged.
Stored without any drain? If you charge it to 70% and top it up every few years, you are good to go. I just played with my Nokia 6310 charged last time 2004. No problem, obviously I don't know how much I lost in capacity over the years..
1)I want to avoid permanent chemical or physical damage to these AA Ni-MH batteries and I charged them 100% in May and stored them but the temperature here in my house varies from 33-36C but I don't know when to charge them again I use the original chargers but they don't have a charge and voltage display
The brands are Mox and Toshiba
2)Li-Ion (xiaomi bm20 3.7v and 804066 3.7V) stored between 3.6 to 3.8v, my home temperature varies between 33-35C. How often should I charge these batteries (weekly, monthly, yearly) to keep them in good condition for long-term storage? If their charge drops too much, they swell or die.
I have drained Ni-HM down to almost 0 voltage. The smart charger would not recognize them so I had to use a non-smart charge for 10 minutes before the smart charger would start charging them.
And they still seem to work OK after a full recharge.
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Impossible to answer without datasheet of that specific battery. You could just measure voltage with multimeter and charge when it's down to 1.1V
Yearly+
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